I build a 20 blocks high column from cubes. I select and copy the top block, then paste. It will appear 20 blocks up away from the mouse pointer. This is not practical.
I do not understand the benefit to use the G key just to be able to place a block to the face of another, especially when I'm amble to build freely on tops, and along the grid. I have a big issue when I use the G. The blocks move smooth, not jumps one block steps like on the grid, so I can not count distances vertically. Just let say I built a wall, and I want to place on the side blocks 7 blocks high, and 6 blocks distances from each. How can I do that fast and precise?
I place a cube, I rotate it along the Y axis 90 degree. It stays in the tile of the grid, look like not even move. This is perfect. If I change the axis to X or Z and rotate the cube it moves out of the tile of the grid, and rotate in the same time. The axis of the X and Z rotation is not the center of the object. Basically it rotate and move in a circle in the same time. Like Earth rotate and same time circle the Sun.